TORn can confirm that as of now, the plans are to feature Frodo in the opening sequence of the films.

Does that mean only the opening sequence? If he is the narrator, or we get cutaways, like The Princess Bride (which worked) from story back to narrator, then I'm not a fan of the idea. If there is to be a narrator, it should be Ian Holm and how hard would it have been to bring him back for the opening sequence? It's his story. It would also somewhat satisfy those fans that wanted him to play Bilbo for The Hobbit films (I don't agree with this). Middle Earth is New Zealand!